So I'm having weird dash issues on my 2001 Tahoe's dash. What happens is that speedometer is very erratic. The fuel gauge goes to all the way below E. Also I get the Low Fuel, Battery, Security, and Service 4WD lights. This all happens at the same time. What is weird is that it only happens sometimes, but won't go away unless it sits for a few hours. Everything actually works fine and there are no drive ability issues. Any input is appreciated.